Door-knob.



R. GRIESER. DOOR KNOB. APPLICATION FILED MAY 29, 1913.

Patented Mar. 17, 1914.

a Woe wlioc a btoz'mu i/ COLUMBIA PLANOGRAPH CO-.WA5HINGTON. D (zv citizen of the United desired metal, but it RICHARD GRIESER, OF YORK, N. Y.

DOOR-KNOB.

Specification of Letters Patent.

Patented Mar. 1'7, 1914.

Application filed May 29, 1913. Serial N 0. 770,583. I t

To all whom it may concern: I

Be it known that I, RICHARD GRmsER, a States, residing in the city-of New York, borough of Brooklyn, and State of New York, haveinvented' oertain new and useful Improvements in Door- Knobs, of which the following is a full, clear, and exact description. I I

This invention relates to door-knobs or handles and more particularly to the type of knob which comprises a metallic shell filled with a suitable filler.

Heretofore solid or cast knobs have been generally manufactured by casting a solid or a substantially solid knob from any desired metal, such as brass, nickel or the like, which produces a highly desirable knob, but the cost of the metal prohibits their common use. Knobs have been made to imitate solid brass or other valuable metal by plating a solid iron or steel knob with the has been found that such plating rapidly wears away, due to the contact and moisture from the hands of persons opening the door,

The principal object of my invention is to provide a lmob comprising a thin metallic shell which shall have the appearance of a solid or cast knob, and my invention consists of a door-knob of this type in which the spheroidal shapedportion or hand member comprises a single piece of metal and has a continuous peripheral surface.

In the drawings, Figure 1 is a central sectional section of the improved knob; Fig. 2 is a similar view of a modification; Fig. 3 is a front elevation of Fig. 2; and Fig. 4 is a detail.

, Referring first to Fig. 1, the knob or handle comprises three distinct parts, a th1n metallic shell 1 made of a single piece of metal, a tubular member or hub 2, and a suitable filler 3. The shell 1 constituting the hand member is shown spheroidal in shape but the particular contour of this member is not important and it may be either plain, as shown in Fig. 1, or fluted, as shown in Figs. 2 and 3, or of any other decorative design, This shell is shaped to the desired contour by the use of an expansion die which leaves a circular opening 4 through which a portion of the tubular member or hub 2 passes. The surface of the hub 2 diverges gradually from its outer end for a portion of its length, and curves outwardly and then inwardly, forming a bead gether after the filler or ridge 5. The surface then extends sub stantially parallel to its axis, forming the cylindrical ring 6 which fits into the opening 4 in-the shell 1 and neatly engages with the walls thereof to provide a tight-joint, the bead 5 acting as a stop and also efi'ectually concealing the joint. The peripheral surface of the ring 6 is formed with an annular groove or recess 7; the plastic material or filler enters this groove and interlocks therewith firmly securing the parts tohas hardened. A square sleeve 8 into which the knob-spindle (not shown) is adapted tovfit, is arranged centrally of the knob and is positioned in place by washers 9 and 10 provided with square holes through which the sleeve passes. The washer 9 is forced in engagement with the converging walls of the outer end of the hub 2 which firmly holds the washer in place, but instead of making the washer 9 separate from the hub 2, the end of the hub may be extended, bent over and formed with a square hole. The washer 10 is shaped as shown in Fig. 4, portions of the same being cut away which provides openings through which the portions of the filler in the respective parts ofthe shell may be pressed together to form a unitary structure and prevent relative movement of the separate portions of the filler. The inner end of the sleeve 8 is provided with a cap 11 which slips into the bore of the sleeve and is preferably held in place by a protuberance 12 formed by indenting one of the surfaces of the sleeve.

In Figs. 2 and 3, I show a modified form of spheroidal shell or hand member 13, the shell being fluted or ornamented in any desired manner, which designs are preferably formed on the shell simultaneously with the expansion of the metal into its spheroidal formby the expansion die. It is not my intention to be limited to any particular shape of shell and the same may be polygonal or of any other desired contour, but it may be here noted that where an ornamental shell is used, the filler will enter the raised portions of the design which will prevent relative movement of the shell and filler.

The knob is assembled in the following manner :The tubular member 2 is placed so that its inner end is uppermost and the washer 9 is dropped into the narrow end of the hub and forced into engagement with the converging Walls until it is flush with from entering th bore of the outer end of the hub. The washer 10 is then seated upon the raised surface which forms the groove 7 and the sleeve 8 is passed through the square holes in each. of the washers. The filler is poured through the openings formed between the walls of the hub and the cut-away portions of the Washer 10 and is allowed to partially harden or set. Any desired filler may be used. The spheroidal shell or hand memberlis thenpartially filled and the sleeve 8 and the ring 6 of the hub member 2 is inserted therein, the head limiting the inward movement of the hub, and the cap 11 preventing any of the filler the sleeve. The amount of filler placed in the shell 1 is determined by experience, so that upon the insertion of the sleeve 8 and ring 6, the displaced material will substantially fill the en tire shell, as shown in Fig. 1. The filler in the shell 1 will be forced through the openings in the washer into engagement with the filler in the hub 2, the two portions of the filler uniting to form a unitary structure. The material in the shell 1 will also be forced into the recess or groove 7 forming a ridge on the the groove and prevent the separation of the hub member from the spheroidal shell.

While the hub 2 is shown as formed of thin sheet material, I reserve the right to make this part of the structure by casting so as to produce a more substantial device. When so made, the hub may or may not be filled. In any case, an important feature of my invention is the fact that the hub is secured to the handle by anchoring or embedding its inner end in the filling material Copies 0! this patent may be obtained tor filler which will co-act with of the handle which on hardening'afi'ords a very strong structure.

Having thus described my invention, I claim 1. A door-knob comprising a metallic shell having a filler therein said shell consisting of a jointless hand member and a hub said hub extending into said hand member and having a groove therein, said groove 7 co-actingv with said filler to securely fasten the parts together. I

2. A door-knob comprising a metallic" shell having a filler therein, said shell consisting of a jointless hand member and a hub said hub extending into said hand member and having a groove therein, said groove coacting with said filler to securely parts together.

shell having a filler therein, said shell consisting of a jointless hand member and a hub, a sleeve within said knob for attachment to the door spindle, and means for positioning said sleeve centrally of said hub.

4. A door-knob comprising a metallic shell having a suitable filler therein, shell consisting of a jointless hand member and a hub, said j'ointless hand member having an opening therein hub passes and a head on said hub for limiting the relative movements of the parts of the shell and for concealing the joint.

In witness whereof, I subscribe my signature,.in the presence of two witnesses. RICHARD GRIESER. Witnesses:

WALDo M. CHAPIN, JULE ZELENKO.

five cent: each, by addreuin: the Oommluionn of Intent;

Washington, D. 6."

fasten the 3. A door-knob comprising a metallic through which said It is hereby certified that in Letters Patent No. 1,090,615, granted March 17, 1914, upon the application of Richard Grieser, of New York, N. Y., for an improvement in Door-Knobs, an error appears in the printed specification requiring correction as follows: Page 2 strike out lines 48-49, comprising claim 1, and insert the Words, A door-knob comprising a metallic shell having a filler therein said shell consisting of a jotntless hand member and a separate sheet metal hub, said hub'ertending into said hand member and hearing means coaettng we'th said filler and with the hand member tofirmly secure said parts together. and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Oflice.

Signed and sealed this 21st day of April, A. D., 1914:.

J. T. NEWTON,

Acting Commissioner of Patents.

[SEAL] 

